Engine Compression
WARNING: This page does not describe the selected car, but rather 11 other vehicles, including the 1999 Plymouth Voyager, 1999 Plymouth Grand Voyager, 1999 Dodge Ram Wagon, 1999 Dodge Ram Van, and 1999 Dodge Pickup. However, it is still accessible from the selected car via links, so may be relevant.
Ensure battery is fully charged. Warm engine to normal operating temperature. Disconnect wire at ignition coil to prevent engine from starting. Check engine compression with all spark plugs removed and throttle wide open.
COMPRESSION SPECIFICATIONS
| Application | Specification | ||||
|---|---|---|---|---|---|
| Compression Ratio | |||||
| Caravan | |||||
| 2.4L | 9.4:1 | ||||
| 3.0L | 8.9:1 | ||||
| 3.3L | 8.9:1 | ||||
| 3.8L | 9.6:1 | ||||
| Dakota & Durango | 9.1:1 | ||||
| Ram Pickup | |||||
| 3.9L, 5.2L & 5.9L (Gasoline) | 9.1:1 | ||||
| 5.9L (Diesel) | 17.5:1 | ||||
| 8.0L | 8.4:1 | ||||
| Ram Van & Ram Wagon | 9.1:1 | ||||
| Town & Country | |||||
| 3.3L | 8.9:1 | ||||
| 3.8L | 9.6:1 | ||||
| Voyager | |||||
| 2.4L | 9.4:1 | ||||
| 3.0L | 8.9:1 | ||||
| 3.3L | 8.9:1 | ||||
| Normal Compression Pressure | |||||
| Caravan | |||||
| 2.4L | 170-225 psi (11.9-15.7 kg/cm2 ) | ||||
| 3.0L | 178 psi (12.5 kg/cm2 ) | ||||
| 3.3L & 3.8L | (1) | ||||
| Dakota | |||||
| 2.5L | 120-150 psi (8.4-10.5 kg/cm2 ) | ||||
| 3.9L, 5.2L & 5.9L | (1) | ||||
| Durango | (1) | ||||
| Ram Pickup, Ram Van & Ram Wagon | (1) | ||||
| Town & Country | (1) | ||||
| Voyager | |||||
| 2.4L | 170-225 psi (11.9-15.7 kg/cm2 ) | ||||
| 3.0L | 178 psi (12.5 kg/cm2 ) | ||||
| 3.3L | (1) | ||||
| Minimum Compression Pressure | |||||
| Caravan, Town & Country, & Voyager | 100 psi (7.0 kg/cm2 ) | ||||
| Dakota | |||||
| 2.5L | (1) | ||||
| 3.9L, 5.2L & 5.9L | 100 psi (7.0 kg/cm2 ) | ||||
| Durango | 100 psi (7.0 kg/cm2 ) | ||||
| Ram Pickup | |||||
| 3.9L, 5.2L & 5.9L (Gasoline) & 8.0L | 100 psi (7.0 kg/cm2 ) | ||||
| 5.9L (Diesel) | (1) | ||||
| Ram Van & Ram Wagon | 100 psi (7.0 kg/cm2 ) | ||||
| Maximum Variation Between Cylinders | |||||
| Caravan, Town & Country, & Voyager | 25 Percent | ||||
| Dakota | |||||
| 2.5L | 30 psi (2.1 kg/cm2 ) | ||||
| 3.9L, 5.2L & 5.9L | (1) | ||||
| Durango, Ram Pickup, Ram Van & Ram Wagon | (1) | ||||
|
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